# PDI transformation counter generated sequence

![Use a transformation counter to generate the sequence](/files/5UXpIBO7016TL8jsmWaD)

The following table contains options for generating a sequence from a PDI transformation counter:

| Option                                 | Description                                                                                                                                                                                                                 |
| -------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Use counter to calculate sequence?** | <p>Select this check box if you want the sequence to be generated by PDI. This option is set by default</p><p><strong>Use DB to generate the sequence?</strong> is automatically selected if this check box is cleared.</p> |
| **Counter name (optional)**            | Specify the name of the counter if multiple steps in a transformation generate the same value name to avoid unique sequencing across multiple steps.                                                                        |
| **Start at value**                     | Specify the value to start the sequence. For example, if **Start at value** is set to `1`, then the sequence will start with `1`. If **Start at value** is set to `0`, then the sequence will start with `0`.               |
| **Increment by**                       | Specify the amount by which the sequence increases or decreases.                                                                                                                                                            |
| **Maximum value**                      | Specify the value to reach before returning the sequence to the **Start at value** setting.                                                                                                                                 |

For example, if you set \*\*Start at value\*\* to \`1\`, \*\*Increment by\*\* to \`1\`, and \*\*Maximum value\*\* to \`3\`, then the resulting sequence will be \`1, 2, 3, 1, 2, 3, 1, 2\`... If you set \*\*Start at value\*\* to \`0\`, \*\*Increment by\*\* to \`-1\`, and \*\*Maximum value\*\* to \`-2\`, then the resulting sequence will be \`0, -1, -2, 0, -1, -2, 0\`...


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